23 June 1995 Measurement of windage heating effects on high-speed rotating disks using ESPI
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Abstract
Real-time analysis of component deformation under service conditions would form the optimum experimental optical technique. Approaching this ideal is pulsed laser electronic speckle pattern interferometry (ESPI) which can provide in-plane displacement information from high speed rotating components over a wide range of rotational speeds with tangential velocities currently up to 300 m s-1. With the rapid advancement of computers, the Fourier transform method of analysis of interference fringe patterns for full field information has been reduced to just a few minutes. The testing of high speed discs in air, with particular reference to gas turbine disc behavior has provided the ability to display the effects of windage heating of the discs, in addition to changes of speed. The technique is sufficiently accurate to record both short term differential heating across the disc, as well as the longer term overall growth.
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Richard W. T. Preater, Robin C. Swain, "Measurement of windage heating effects on high-speed rotating disks using ESPI", Proc. SPIE 2545, Interferometry VII: Applications, (23 June 1995); doi: 10.1117/12.212643; https://doi.org/10.1117/12.212643
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KEYWORDS
Fringe analysis

Speckle

Fourier transforms

Speckle pattern

Computing systems

Pulsed laser operation

CCD cameras

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